Water that does not evaporate first passes through the canopies and carries nutrients to the soil through leaves and branches or along the stems. Photo: Stuart Rankin CC BY-NC 2.0 DEED Attribution-NonCommercial 2.0 Generic

This is how canopies affect the distribution of soil nutrients

Chinese research analyzed nutrient precipitation dynamics by identifying and quantifying soil enrichment mechanisms in relation to climate and vegetation

Re Soil Foundation